<!DOCTYPE html>
<html>
<head>
  <title>WebGPU copyExternalImageToTexture test</title>
  <style type="text/css">
  .nomargin {
    margin: 0px auto;
  }
  </style>
  <script type="text/javascript" src="pixel_webgpu_util.js"></script>
  <script type="text/javascript">
    var g_swapsBeforeAck = 15;

    async function main() {
      const glCanvas = document.getElementById('canvas_gl');
      const gl = glCanvas.getContext('webgl');
      if (!gl) {
        console.error('getContext(webgl) failed');
        domAutomationController.send("FAILURE");
        return;
      }

      const gpuCanvas = document.getElementById('canvas_gpu');
      const [gpuDevice, gpuContext] = await webGpuUtils.init(gpuCanvas);
      if (!gpuDevice || !gpuContext) {
        console.error("Failed to initialize WebGPU - skipping test");
        domAutomationController.send("FAILURE");
        return;
      }

      const renderCallback = function() {
        gl.enable(gl.SCISSOR_TEST);
        gl.scissor(0, 0, 100, 100);
        gl.clearColor(1.0, 0.0, 0.0, 1.0);
        gl.clear(gl.COLOR_BUFFER_BIT);

        gl.scissor(0, 100, 100, 100);
        gl.clearColor(0.0, 1.0, 0.0, 1.0);
        gl.clear(gl.COLOR_BUFFER_BIT);

        gl.scissor(100, 100, 100, 100);
        gl.clearColor(0.0, 0.0, 1.0, 1.0);
        gl.clear(gl.COLOR_BUFFER_BIT);

        gl.scissor(100, 0, 100, 100);
        gl.clearColor(1.0, 1.0, 0.0, 1.0);
        gl.clear(gl.COLOR_BUFFER_BIT);

        webGpuUtils.uploadToGPUTextureTest(gpuDevice, gpuContext, glCanvas,
                                           {useImport: false, isWebGLCanvas: true});

        waitForFinish();
      };

      window.requestAnimationFrame(renderCallback);
    }

    function waitForFinish() {
      if (g_swapsBeforeAck == 0) {
        domAutomationController.send("SUCCESS");
      } else {
        g_swapsBeforeAck--;
        window.requestAnimationFrame(waitForFinish);
      }
    }
  </script>
</head>
<body onload="main()">
  <canvas id="canvas_gl" width="200" height="200" class="nomargin"></canvas>
  <canvas id="canvas_gpu" width="200" height="200" class="nomargin"></canvas>
</body>
</html>
